Real Housewives of Beverly Hills' Kathy Hilton blasts her new enemy co-star Lisa Rinna in the show's fiery reunion show airing next week.
Part one of the season 12 reunion, which comes out next Wednesday, is set to include a blazing row between the 63-year-old socialite and 59-year-old ex-soap star.
Kathy, the mother of Paris Hilton, brands Rinna, who she has known for decades, the "biggest bully in Hollywood" in an action-packed preview released by Bravo on Thursday.